Knife



FIG. 1 is a side view of the knife embodying the design, the opposite side being a mirror image of the side shown;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof. 

The ornamental design for a knife, as shown and described. 